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(No Modell.) Z-Sheets-Sheen 1'.

y' EE M. BIRDSALL.

TRAGTION WHEEL.

No. 403,321. Patented May 14., 1889.

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(No Model.) 2 Sheets-#Sheet 2.

, E. M. BIRDSALL.

TRA-GTION WHEEL.

No. 403,321. Patented May 14,1889.

w` PETERS. Phnbumngmpho UNITED STATESV PATENT OFFICE.

EDGAR IWI. BIRDSALL, OF BUFFALO, NEW YORK, ASSIGNOR TO MARY BIRDSALL, OF SAME PLACE.

TRACTlON-WHEEL.

SECIFICATIN formingpart of Letters Patent No. 403,321, dated May 14, 1889.

Application filed December 26, 1888i Serial No. 294,599. (No model.)

To all whom it may concern.-

Be it known that I, EDGAR M. BIRDSALL, of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Traction-Wheels, of which the following is a specification.

This invention relates to that class of traction-wheels in which the rim is composed of cast sections secured together and connected with the hub by wrought-iron spokes.

My invention has the object to provide simple means for securing together the several sections of the rim, and also to provide the hub of the wheel with an efficient device for locking the nuts of the spokes in place.

The invent-ion consists of the improvements which will be hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, consisting of two sheets, Figure l is a side elevation of my improved traction-wheel, partly in section. Fig. 2 is a transverse section thereof. Fig. 3 is a fragmentary crosssection of the rim on an enlarged scale. Fig. 4 is a face view of a portion of the rim. Fig. 5 is a cross-section of the rim at right angles to the axis of the wheel. Fig. 6 is an outside elevation of one of the nut-lock plates. Fig. 7 is a fragmentary cross-section of said plate applied to the hub. Fig. 8 is a fragmentary inside elevation of one of the nut-lock plates.

Like letters of reference refer to like parts in the several figures.

A represents the segmental sections constituting the rim, which are provided in their faces with ribs a and openings a in the usual manner for increasing the traction of the wheel. Each rim-section A is provided in opposite sides with a groove or depression, b, arranged concentric Awith the face of the rim, as represented in Fig. l, se that when the rimsections are in position a continuous annular depression will be formed on opposite sides of the rim, near the periphery thereof.

C represents annular clamping bands or rings arranged in the annular grooves b, and whereby the rim-sections A are firmly secured together. These clampingbands consist, preferably, of endless hoops or rings, which are placed in the grooves b in a heated and expanded condition and contract in the grooves by cooling, and thereby draw the rim-sections tightly together. The inner portions of the grooves or depressions b are preferably underout, as represented in Fig. 3, so that the clamping-bands will be securely confined in the grooves by the projecting edges of the latter.

D represents the hub of the wheel, and E are the wrought-iron spokes, which are seated with their outer headed ends in openings e, formed in the rim. The inner portions of the spokes are secured in perforated radial lugs or enlargements f, formed on opposite sides of the hub, by means of screw-nuts g, applied to the threaded inner ends of the spokes and bearing against the lugs f. The spokes are arranged alternately on opposite sides of the hub in a Well-known manner.

H H represent nut-lock plates applied to opposite sides of the hub, and whereby the clamping-nuts g are held against turning after being tightened on the spokes. These nut-lock plates consist of disks provided with an annular row of fiat-sided recesses or depressions, t', which fit over the outer portions of the nuts g, as represented in Figs. 2, 7, and 8. The nut-lock plates are secured to the outer sides of the hub by bolts il', as shown in Fig, 2, or by other means. The locking-plates H are provided on their inner sides, at their outer edges, with proj ections j, which close the spaces between the lugs or enlargements f and form a smooth joint at these points. These locking-plates also serve as caps, which cover the fastenings at the inner ends of the spokes and give the hub a finished appearance.

I claim as my inventionE 1. In a tractionnwheel, the combination,with the rim composed of segmental sections and provided in its side with an annular groove or depression, of a clalnping-band arranged in said groove, whereby the rimfsections are secured together, substantially as set forth.

2. In atractionavheel, the combination,with the rim composed of segmental sections, each of which is provided in its side with a concentric groove or depression, and an endless clamping-band secured in said grooves by being shrunk into the same, substantially as set Ioo forth.

3. The combination, with the rim and spokes of a traction-Wheel, of a hub, D, provided between the lugs fof the hub, substantially zo with perforated radial lugs f, which reeeive as set forth.

the inner ends of the spokes, screw-nuts g, Vitness my hand this 21st day of Septemapplied to the inner ends of the spokes and ber, 1888.

bearing against said lugs, and a loeking- J plate, H, provided with an annular rouT of re- EDGAR M' BIRDSALL eesses, z', fitting over the outer portions of said iNTitnesses:

nuts, and projections j, formed around the JNO. J. BONNER,

outer edge of said locking-plate and fitting` FRED C. GEYER. 

